I am reading a book called"The death and life of the Great Lakes by Dan Egan. He covers the problems that have been created by invasive species that have spread all across the United States many of which came in through the St.Lawrence Seaway up into the Great Lakes. Lake Michigan and Lake Huron crashed in a very short amount of time. Lake Erie is also at risk. Foreign ships discharging their ballast water has caused the current problems we face today. Enjoy it while it's good because the lake is constantly changing.